The Nets’ biggest trade chip is Cameron Johnson. Teams monitoring the situation this week didn’t think anyone would make an offer strong enough to acquire Johnson. Another name to watch is Day’Ron Sharpe. The Clippers are among the teams who’ve done background work on Sharpe, who will be a free agent this summer. I don’t know if the Nets and Clippers have had advanced talks on Sharpe, but I can safely assume teams will continue to call Brooklyn about the 23-year-old big man.